Seeking the origin of the ancient story, a man was caught, and then others made buns out of his mother's meat and fed them to him. He ran away with them in his mouth.

In the Zhou Dynasty, Zhou Gongdan knew about divination, that is, the Book of Changes. He was in prison at that time, and his people heard that he was very accurate in predicting the future.

I decided to let him kill Zhou Gongdan's son and then give him his son's meat to test how accurate his prediction was. If it really counts, I killed him. As a result, Zhou Gongdan has calculated the disaster. In order to save his life and make great achievements in the future, he had to put up with humiliation and pretend that he didn't know how to eat his own flesh and blood, and then spit it out afterwards.